According to the situation you described, I suggest you try:

1. Drop down the menu bar to see if reading mode is on.

2. Check whether the third-party software is newly downloaded and installed on the mobile phone. It is possible that this display is set in the software. I suggest you turn it off in the software.

3. If it doesn't return to normal, I suggest you back up your mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore the factory settings (Settings-Reset-Restore Factory Settings);

If the problem still exists, I suggest you take the three-guarantee certificate and send your mobile phone to the nearest Samsung service center for inspection and maintenance. Please visit:

If you have any comments, suggestions and comments, please click: support.samsung.com.cn/survey.